<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Ean5.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_Ean13
 */
require_once 'Zend/Barcode/Object/Ean13.php';

/**
 * @see Zend_Validate_Barcode
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Ean5 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Ean5 extends Zend_Barcode_Object_Ean13 {
	
	protected $_parities = array (0 => array ('B', 'B', 'A', 'A', 'A' ), 1 => array ('B', 'A', 'B', 'A', 'A' ), 2 => array ('B', 'A', 'A', 'B', 'A' ), 3 => array ('B', 'A', 'A', 'A', 'B' ), 4 => array ('A', 'B', 'B', 'A', 'A' ), 5 => array ('A', 'A', 'B', 'B', 'A' ), 6 => array ('A', 'A', 'A', 'B', 'B' ), 7 => array ('A', 'B', 'A', 'B', 'A' ), 8 => array ('A', 'B', 'A', 'A', 'B' ), 9 => array ('A', 'A', 'B', 'A', 'B' ) );
	
	/**
	 * Default options for Ean5 barcode
	 * @return void
	 */
	protected function _getDefaultOptions() {
		$this->_barcodeLength = 5;
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (5 * $this->_barThinWidth) * $this->_factor;
		$middleCharacter = (2 * $this->_barThinWidth) * $this->_factor;
		$encodedData = (7 * $this->_barThinWidth) * $this->_factor;
		return $quietZone + $startCharacter + ($this->_barcodeLength - 1) * $middleCharacter + $this->_barcodeLength * $encodedData + $quietZone;
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$barcodeTable = array ();
		
		// Start character (01011)
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		
		$firstCharacter = true;
		$textTable = str_split ( $this->getText () );
		
		// Characters
		for($i = 0; $i < $this->_barcodeLength; $i ++) {
			if ($firstCharacter) {
				$firstCharacter = false;
			} else {
				// Intermediate character (01)
				$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
				$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
			}
			$bars = str_split ( $this->_codingMap [$this->_getParity ( $i )] [$textTable [$i]] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array ($b, $this->_barThinWidth, 0, 1 );
			}
		}
		
		return $barcodeTable;
	}
	
	/**
	 * Get barcode checksum
	 *
	 * @param  string $text
	 * @return int
	 */
	public function getChecksum($text) {
		$this->_checkText ( $text );
		$checksum = 0;
		
		for($i = 0; $i < $this->_barcodeLength; $i ++) {
			$checksum += intval ( $text {$i} ) * ($i % 2 ? 9 : 3);
		}
		
		return ($checksum % 10);
	}
	
	protected function _getParity($i) {
		$checksum = $this->getChecksum ( $this->getText () );
		return $this->_parities [$checksum] [$i];
	}
	
	/**
	 * Retrieve text to encode
	 * @return string
	 */
	public function getText() {
		return $this->_addLeadingZeros ( $this->_text );
	}
}
